Next wave

[predragnikolic]

• remove vs code specific settings
• allow server to start in buffers
• extend the scopes in which the server can start
• handle server code action commands to add words to a cspell.json file, user provided custom dictionary or adding words to user settings.
• dropped ST 3 support
• added sublime-package.json file for JSON schema validation is sublime settings files.

In the process I also wanted to the cSpell.fixSpellingWithRenameProvider setting work... but I need more time for that, so I skipped that in this PR :)